LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> GMC >> 1987 >> Forward Control 5.7 M, Standard >> Repair and Diagnosis >> Electrical >> Component Locations >> Electrical Component Locator >> Sending Units/Sensors
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Sending Units/Sensors

SENDING UNITS/SENSORS LOCATION

Component Location
Coolant Temp. Sending Unit/Switch On left of engine.
Coolant Temperature Sensor In right front corner of intake manifold.
Detonation (Knock) Sensor (ESC) On lower left side of engine block.
Engine Speed Sensor (6.2L) On top of vacuum pump.
MAP Sensor (Diesel) On right firewall in engine compartment.
MAP Sensor (Gas) On top right side of engine. See Figure.
Oil Pressure Sending Unit/Switch On top rear of block.
Oxygen Sensor In exhaust manifold.
Throttle Position Sensor (Gas) On throttle linkage. See Figure.
Throttle Position Sensor (Diesel) On pump throttle valve. See Figure.
Vehicle Speed Sensor In instrument panel behind speedometer.